Improvement in feed-water heaters and circulators for steam-boilers



'2 snaps-Sheet 1. .J. C. STEA'D. Feed-Water Heater and Ciroulator fo r'Steam-Boilers.

' No. 207,779. Patnted Sept. 3,18,78.-

)LFETERS. PHOTO-LITHOGRAFHER. \VASH!NGTON. D. C.

2 Sheets-Sheet 2;

J. 0. STEAD'. Feed-Wate'r'Heater and Circulator for-Steam-Boi1-ers..

No. 207,779. Patenfed Sept. 3, 1878.

Figure .2.

- N.P'EIERS. FHOTO-LITNOGRAPNER, WASHINGTON, u. C.

- the feed-water coil.

UNITED STATES PATENT ()FFIGE.

JAMES C. STEAD, OF GREEN POINT, NEW YORK.

IMPROVEMENT IN FEED-WATER HEATERS AND CIRCULATORS FOR STEAM-BOILERS.

Specification forming part of Letters Patent, No. 207,779, datedSeptember 3, 1878 application filed July 8, 187S.-

To all whom it may concem:

Be it known that 1, JAMES C. STEAD, of Green Point, New York, haveinvented certain Improvements in Feed-Water Heaters and Oirculators forSteam-Boilers, of which the following is a specification:

My improvements relate to that class of feed-Water apparatus which iscomposed of a heating-coil, one end of which is connected with the waterbody in the bottom of the boiler and with the service-pipe, and theother end is connected with the steam-space in the boiler; and myinvention consists in the combination of such a coil with the insidefines and end connections of an inside-flue boiler.

The accompanying drawings represent a horizontal return-flue boilerprovided with my feedwater heater and circulator, and are as follows:

Figure 1 is a view of the rear end of the boiler, showing the externalconnections of Fig. 2 is a transverse section of the boiler through theline y y on Fig. 3. Fig. 3 is a longitudinal vertical section upon theirregular line 00 x in Figs. 2 and 4:, and Fig. 4 is a transversevertical section through the line 2 2 on Fig. 3.

The drawings represent a return-flue boiler, A, having a furnace, B, atits front end, from which the products of combustion pass through thefines O O to the rear connection I), and thence through the return-finesE E E E into the front connection F, from which they make their escapeinto the smoke-stack G.

The feed-water is introduced into the boiler from the service-pipe H,and may be directed into the bottom of the boiler by means of the pipeI, or into the feed-water coil, and thence into the top of the boiler bymeans of the pipe K, according to which of the two valves I and K isopen while the other is closed. In use, it is intended that the feedshall take place through the'pipe K into the coil; and during thefeeding operation, therefore, the valve I is closed and the valve K isopen. The valve K is affixed to the lower extremity of the cod pipe L,in which the feed-water is heated. This pipe traverses back andforth,longitudinally, the flue G, then crosses through the rear connection tothe other flue, O, which it traverses back and forth on a slightlyhigher elevation. The coil then makes several turns, P, back andfort-hthrough the rear connection, then extends forward through one of thereturn-fines into the front connection, where it again makes severalturns, Q, back and forth, and is then returned through one of the otherreturn-flues, E, to the rear end of the boiler, where-it is joined to avalve on the end of the pipe R, which is connected with the steamspacein the boiler.

When the feeding operation is completed, the service-pipe valve H isclosed, and, the other valves being open, the coil then acts as acirculator. Water from the bottom of the boiler enters into the coilthrough the pipes I and K, and passing upward is discharged into thesteam-space in the boiler through the pipe R.

It will be seen, on reference to Figs. 2 and 4, 7 that the return-bendsof the pipe traversing the fiuesare arranged on successively higherelevations, so that the feed-water and the water from the bottom of theboiler enter that part of the coil which is lowest, and gradually risesas it flows through the coil.

That part of my invention which consists in arranging the convolutionsof the heatingcoil inthe end connections of the boiler is applicable toupright tubular boilers. When so employed, the heating-coil, aftermaking several turns back and forth in the upper part of the furnace, iscarried through one of the vertical fines to the upper connection, whereit makes several turns back and forth, and thence is carried into thesteam-space in the boiler.

It will be seen that the pipe I extends horizontally through thewater-body in thebottom of the boiler nearly to the front end of theboiler, and is closed at the end, but is provided with a series ofperforations, t, upon its upper side. The object of thus extending andperforating the pipe I is to draw water from the lower part of thewater-body along the whole length of the boiler.

I claim as my invention- 1. The combination of an inside-flue boilerwith a heating-coil traversing the flue or lines of such boiler, andhaving convolutions in the end connections of the boiler, and beingconnected at one end with the service-pipe and tially as described.

2. In combination with the feed-water-heating coil, having a connectionwith the steamspace-in the upper part of the boiler, the drawoff pipe I,provided with the perforations z, and extending through the lower partof the water-body along nearly the whole length of the boiler,substantially as described.

JAMES C. STEAD.

Witnesses:

ROBERT H. PoLLooK, EDWD. PAYSON.

